Biological and sequence data suggest that potato rough dwarf virus (PRDV) and potato virus P (PVP) are strains of the same species

Abstract

Potato rough dwarf virus (PRDV, genus Carlavirus) was originally described in Argentina by Butzonitch et al. [1]. Potato virus P (PVP) had been reported previously in Brazil [3] and also catalogued as a member of the genus Carlavirus [5]. PRDV presents frequent asymptomatic infections, and when symptoms appear, causes dwarfism, leaf deformation, leaf roughness, and systemic interveinal chlorosis [5]. Until now, PVP has been reported to be asymptomatic [5]. Nicotiana occidentalis has been used as propagation host and inoculated mechanically at the 3–4 leaf stage with sap from infected leaves from original virus sources (cv. Sierra Volc´an INTA for PRDV and from cv. Baronessa for PVP). Previous results using double antibody sandwich enzyme-linked immuno-sorbent assay (DAS-ELISA) [2] showed cross-reactions in PVP-infected plants with anti-PRDV and vice versa [1]...